thanks for your query, i have gone through your question, the ulcers over the upper lip
could be aphthous ulcers
secondary to stress, take topical anesthetic
and anagesic, consume lot of water, rinse your mouth with saline.....the dizziness
could be due to weakness...for the lump in the throat consult a ENT surgeon for proper examination and management,,...
i hope my answer will help you..
Dr. Mahesh Kumar T.S